SOLUTION FOR NO SERVICE ISSUE ON 5Z

[Sufyan]

I GOT THE SOLUTION!!!!
DOWNLOAD the app signal spy
And then allow the permission
After that choose Dialer codes
Then choose auto and do as the app commands you to do my network  is back and after network comes back 
Go to settings and network and internet
Then mobile network and then preferred network type 
It must be global change it to 2g/3g/4g

I hope your problems gets solved too
Please like if it helped you and share to the ones who need it 

Thank you
Sufyan